68813638 has 4 divisors (see below), whose sum is σ = 103220460. Its totient is φ = 34406818.

The previous prime is 68813617. The next prime is 68813639. The reversal of 68813638 is 83631886.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 68813594 and 68813603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68813639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17203408 + ... + 17203411.

It is an arithmetic number, because the mean of its divisors is an integer number (25805115).

Almost surely, 2^68813638 is an apocalyptic number.

68813638 is a deficient number, since it is larger than the sum of its proper divisors (34406822).

68813638 is a wasteful number, since it uses less digits than its factorization.

68813638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34406821.

The product of its digits is 165888, while the sum is 43.

The square root of 68813638 is about 8295.3986040455. The cubic root of 68813638 is about 409.7869962400.

The spelling of 68813638 in words is "sixty-eight million, eight hundred thirteen thousand, six hundred thirty-eight".